Friction-pulley mechanism for looms.



No. 59mm. Patented Dec. 3|, I90I. A. s." COW-AN.

FRICTION PULLEY MECHANISM FOR LODMS.

' (Application filed June 22, 1901. (No Model.)

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A. s. cow/m. FRICTION PULLEY MECHANISM FOR LOOMS (Applicn tion filedJune 22, 1901.) (No Model.)

UNlTED STATES PATENT OEEIcE.

ARTHUR S. COWAN, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON &KNOWLES LOOM WORKS, OF 'WORCESTER, MASSA- CHUSETTS, A CORPORATION OFMASSACHUSETTS.

FRICTION-PULLEY MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 690,016, dated December31, 1901.

Application filed June 22,1901. Serial No. 65,575. (No model.)

To ctZZ 1572 0771 it may concern;

Be known that I, ARTHUR S. COWAN, a citizen of the United States,residing at WVorcester, in the county of WVorcester and State ofMassachusetts, have invented certain new and useful Improvements inFriction-Pulley Mechanism for Looms, of which the following is aspecification.

My invention relates to friction pulley mechanism for driving-pulleys;and the object of my invention is to improve upon the ordinaryconstruction of friction-pulley mechanisms for driving-pulleys, and moreparticularly to provide means for drawing the loose driving or beltpulley against the friction surface and looking it in its position whenin contact with the friction-surface. It has been customary heretoforeto move the loose driving or belt pulley against the friction surfaceattached to the driving-shaft by leverage, and considerable leverage isrequired to maintain a su fticient amount of friction between the pulleyand the friction-surface to drive the shaft. This leverage iscommunicated to the shaft and causes friction in the bearings of theshaft, and consequently waste of power, and also an end thrust to theshaft.

In my improvements the drawing of the loose pulley toward thefriction-surface and locking it thereto overcomes all tendencies of endthrust on the shaft.

My invention consists in certain novel features of construction of myfriction-pulley mechanism for loose driving or belt pulleys, as will behereinafter fully described.

Referring to the drawings, Figure 1 is an end view of a loom-frame,showing my improvements in friction-pulley mechanism for driving-pulleysapplied thereto. Fig. 2 is a plan view of the parts shown in Fig. 1looking in the direction of arrow a, same figure. Fig. 3 is, on anenlarged scale, a section on line 3 3, Fig. 1, looking in the directionof arrow 1), same figure, showing the drivingpulley out of engagementwith the frictiondisk; and Fig. 4. corresponds to Fig. 3, but shows thedriving-pulley in engagementwith and locked to the friction-surface.

1n the accompanying drawings, 1 is the loom side or frame. 2 is a shaftmounted in hearings on the loom-frame and on an arm 1', secured to thebracket 1, bolted to the frame 1, (see Fig. 2,) andhavingthe driving orbelt pulley3 loose thereon. 4 is a driving-gear secured on the shaft 2,in this instance by a spline 2. The friction-surface is in this instancemade in the shape of a circular plate or disk 5, provided with ahand-wheel 5, and having the arms 5 secured by bolts 6 and nuts 7 to thegear 4, and with a friction-surface consisting of a ring of leather orother material 5, secured on the face of the disk 5, adjacent to thedriving-pulley 3, which is loose on the shaft 2 and adapted to be movedthereon in the direction of the length of the shaft and driven hya belt.(Not shown.) A friction-band wheel 9 (see Fig. 2) is secured to the gear4., and around said wheel passes a friction-band, (not shown,) which isbrought into engagement with the wheel 9 when the shipper is thrown offin the ordinary way.

The parts above described correspond to similar parts ordinarily used infriction-pulley mechanism of looms.

I will now describe my improvements for moving and locking thedriving-pulley 3.

On a collar 10, loosely mounted on the turned-down hub 3 of the pulley 3and having an annular groove 10 therein, are two oppositely-extendin glugs or ears 10, to each of which is pivotally connected by a pin orstud 11 one end of a connector 12, forked at each end. The oppositeforked end of each connector 12 is pivotally conneetedby a stud 13 withthe head 14 of a bolt 15. Each bolt 15 is screwed into the outer end ofa curved rocking lever 16, which is pivoted. at its inner end on a stud19, supported between two arms 17, extending out from a plate 18,secured to the pulley 3, as by bolts 18. (See Fig. 1.) A stud 20pivotally secures the forked end of each rocking lever 16 to one end ofa sliding bar 21, which extends in the forked end of the lever 16 andhas its bearings in an opening in the pulley 3. The opposite end of eachsliding bar 21 has an open end slot 21 to extend over and receive aninwardly-projecting annular flange 5 on the friction-disk 5. It will benoted that the end of the sliding of thebolt '34, secured to the arm 1.

bar 21 by virtue of the slot 21 receives the annular flange 5" of thefriction-disk 5, so that sliding movement of the bar 21 in eitherdirection positively moves the friction-disk or pulley either into orout of engagement with each other by the walls of the slotted ends ofthe sliding bars engaging opposite sides of the flange and also thattheflange of the friction-disk remains at all times in engagement with theslot 21 of the sliding bar 21, thus insuring positive action of thefriction-disk upon any movement of the sliding bars. Within the open endslot 21 of each sliding bar 21 is preferably secured a piece of fiber orother material 22.

I will now describe the shipping mechanism shown in the drawings andused in this instance to move the driving-pulley 3 on the shaft 2 intoand out of engagement with the friction-surface 5" on the friction plateor disk.

The shipper-lever 23 is mounted on a stud 24on the loom-frame 1 and hasat its lower end a pin 23, which engages a slot 25 in-the "rocker-arm25, pivoted on a stud 26 in the loom-frame.

H The lower end of the rockerarm 25 is connected by a link 27 with onearm of' a'n angle-lever 28,having a hub 28 mounted b'na stud 29 in abracket 30,bolt'ed to the loomframe. The other arm of the angle-lever 28is attached to'an adjustable connector 31,

which is attached to the end of the lever 32,

centrally pivoted at 33 in the slotted end 34 The other end of the lever33 is forked and has open end slots in its forked end to receive thepins 35, extending out from a ring 35, extending loosely in the annulargroove 10 in the collar 10.

The operation of the locking mechanism for movingthe pulley 3 intocontact with the friction-surface 5" on the friction-disk'5. and lockingit thereto will be readily understood by referring to Figs. 3 and 4.

When the shipper-lever 23 is in the position shown in Fig. 1, thedriving-pulley 3 is in contact With the friction-surface 5 on thefriction-disk 5, as shown in Figs. 2 and 4, and the shaft 2 and the gear4 are operated. When the shipper-lever 23 is moved in the direction ofarrow 0, Fig. 1, the pulley 3, through intermediate connections, ismoved out of engagement with the friction-surface 5 on the friction-disk5 and into the position shown i n'Fig. 3, allowing the pulley 3 to runloose on the shaft 2. The drawing forward of the shipper-lever 23 tomove the pulley '3 into '-contact with the friction-surface 5 will,

through rocker-arm 25, link 27,angle-lev'er '28, connector 31, and lever32, move the col- "lar'10 in the direction of arrow 01, Fig. 3, andcause the rockin'g'levers 16, through connectors 12 and bolts 15, tobemoved on their pivotal supports and move the sliding bars 21 to 'canse them to engage the annular flange 5 on th'e'friction-disk 5 and movethe drivingpulley 3 on the shaft 2 into engagement with surface beattached to the gear 4.

the friction-surface 5 on said friction-disk 5, as shown in Fig. 3. Themovement of the collar 10, above described, brings the studs 11 intoalinement with the studs 13 and holds the rocking levers 16 and slidingbars 21 to lock the pulley 3 to the friction-disk. When theshipper-lever '23 ismoved into the opposite direction, the collar 10,through intermediate connections, is moved in the'direction of arrow e,Fig. 4, into the position shown in Fig. 3, and if the pulley 3 andfriction-surface 5" do not disengage readily the lip 21" on the slidingplate 21 coming into contact with the flange 5" on the friction-disk 5will force the pulley 3 away from the frictiondisk 5.

It will be understoodthat the details of construction of my improvementsmaybevarie'd, if desired. Any other well-known construction of shippingmechanism to move the collar 10 may be employed, if desired.

It is not necessary that the frictionplate or It may be made separatetherefrom and both fast on the shaft. Instead of a rotating sh'aft'astationary shaft or journal may be used, the frictionplate 5 and gear 4being loose thereon and the gear 4 meshing into and driving another gearon another shaft, if desired.

Having thus described my invention,-'what I claim as new, and desireto-secure byLetters Patent, is-

1. In a friction-pulley mechanism, thecombination of a shaft, a frictiondisk or plate, and a pulley, one of said parts being fast and the otherloose on said shaft, and means for positively moving said friction diskorplate and said pulley into and out of frictional e'ngagement, saidmeans comprisingbearings in said pulley,'sliding bars moving lengthwisein said bearings and havin'g'slotte'd ends,'a flange on said frictiondisk or plate in engagement with the slotted ends of said sliding barswhereby the walls of. said slots en= gage opposite sides of the saidflange to move the parts positively into and out of engage- 1 ment, asliding collar on the shaft and means intermediate said collar andsliding bars for moving the latter from the former.

2. Inafriction-pulley mechanism, the combination of a shaft, a frictiondisk or plate fast on said shaft, a pulley loose on saidshaft andprovided with bearings,-sliding ba'rsmovable in said bearin g in theloose pulley, rocking levers pivoted on said loosepul'ley and connectedto said'sliding bars, a collarloose' on the shaft and means intermediatethe col lar and rocking levers for moving the sliding bars, the saidfriction-disk being provided witha flange, and said sliding bars havingslotted ends engaged by said flange, the walls of said slotted endsadapted to engage opposite sides of said flange to positively move theloose pulley into and out of engagement with the friction-disk.

3. In a friction-pulley mechanism, thecom bination of a shaft, afriction disk or plate,

and a pulley, one of said parts being fast and the other loose on saidshaft, and means for positively moving said friction disk or plate andsaid pulleyinto and out of frictional engagement, said means comprisingbearings in said pulley, sliding bars movable lengthwise in saidbearings and having slotted ends, a flange on said friction disk orplate in engagement with the slotted ends of said sliding bars wherebythe Walls of said slots engage opposite sides of the said flange to movethe parts positively into or out of engagement, a sliding collar on theshaft, rocking levers pivoted on said pulley, connections between saidroeking levers and the sliding bars, and connectors joining the rockinglevers and the sliding collar.

4:. In a friction-pulley mechanism, the combination of a shaft, a gearfast on said shaft, a friction disk or plate secured to said gear, apulley loose on said shaft and adapted to be moved into engagement withthe frictiondisk, bearings in said pulley, sliding bars movable in saidbearings and provided With slotted ends, said friction disk or platebeing provided with a flange in engagement with the slotted ends of thesliding bars, the walls of the said slotted ends adapted to engage theopposite sides of said flange to cause a positive movementof the pulleyinto and out of engagement with said friction-disk, rocking leverscarried by said pulley and connected to the sliding bars, and means foroperating the rocking levers to move the sliding bars in their bearingsin the pulley.

5. In a friction-pulley mechanism, the combination of a shaft, a gearfast on said shaft, a friction disk or plate secured to said gear,

a pulley loose on said shaft and adapted to be moved into engagementwiththe frictiondisk, bearings in said pulley, sliding bars movable in saidbearings and provided with slotted ends, said friction disk or platebeing provided with a flange in engagement with the slotted ends of thesliding bars, the Walls of the said slotted ends adapted to engage theopposite sides of said flange to cause a positive movement of the pulleyinto and out of engagement with said friction-disk, rocking leverscarried by said pulley and connected to the sliding bars, bolts adjustably engaging the ends of the rocking levers, a collar loose on thesaid shaft, and connectors joining the collar and bolts to move thesliding bars in their bearings in the pulley.

ARTHUR S. COWANi Witnesses:

J. O. DEWEY, M. HAAS,

